Audio speaker



FIG. 1 is a front elevational view of an audio speaker showing our new design;

FIG. 2 is a back elevational view thereof;

FIG. 3 is a left-side elevational view thereof; the right side being a mirror image thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a front perspective view thereof. 

The ornamental design for an audio speaker, as shown and described. 